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Auto-trim white margins in a PDF

Automatically remove white margins around the content of each page. The tool detects content boundaries and crops each page to exactly that size.

Choose your PDF

Drop here or click to choose

Files stay on your device — nothing is uploaded

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Your file is processed in your browser and never uploaded.

How does it work?

  1. 1

    Choose your PDF

    Drag the PDF here.

  2. 2

    Adjust the padding

    Choose how much space to keep around the content.

  3. 3

    Download

    Download the trimmed PDF.

Frequently asked questions

Does this work for scanned pages?

Yes. The tool renders each page as an image and looks for non-white pixels to determine the content boundary.

Are pages converted to images?

Yes, because the tool uses pixel analysis. Text stays visible but loses selectability.

Are my files uploaded?

No. Everything happens in your own browser. Your file never leaves your device and is not stored anywhere.

Is it free?

Yes, completely free, without watermark or account. The site is paid for by ads.

More reading

Crop a PDF: remove white space and marginsLarge margins or empty borders in a PDF are annoying when printing or presenting.Add margins to a PDFIs text too close to the edge of your PDF page? Or do you want space for annotations? With PDFrust's margins tool you add white space on all sides without distorting the content.

Why in the browser?

PDFrust runs entirely in your browser using WebAssembly and modern JavaScript libraries such as pdf-lib and PDF.js. Your file is never sent to a server — all processing happens locally on your device. This means your documents remain private by design, regardless of what they contain. There is no account required, no file size limit, and nothing is stored after you close the tab.

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